Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Random
H E Random
| Question | Answer |
|---|---|
| Negative side of the x-ray tube | CATHODE |
| coil of wired that is 2mm in diameter and 1-2 cm long | Filament |
| Filaments are made of | thoriated tungsten |
| Thoriated tungsten has a high melting point | 3410 degrees C |
| the filament is embedded in a metal cup called | Focusing cup |
| Tube current is controlled by | filament current |
| This collection of electrons is termed | space charge |
| Positive side of the x-ray tube | Anode |
| Two types of anodes | stationary and rotating |
| used in dental systems and in some portable units | Stationary |
| area on the anode that is struck by the electrons | Target |
| The target is made of | tungsten with rhenium |
| gives the target added mechanical strength | tungsten with rhenium |
| the entire rotating disc is the target | Rotating anode |
| Radiation intensity is greater on the cathode side of the field than on the anode side | Heel Effect |
| Two types of charts | radiographic rating and anode cooling |
| used to determine the amount of time it takes for the x-ray tube to cool | Anode cooling chart |
| used to determine the maximum time and kVp that can be used for a given mA station | Radiographic rating chart |
| Radiation produced from outside of the focal spot | Extrafocal Radiation |
| EXTRAFOCAL RADIATION CAUSES | increase exposure to the patient and decreased image contrast |
| Most anodes rotate at | 3,400 rpm |
| The shaft of the anode is made of | molybdenum |
| receives electrons from the cathode and conducts them back through the cables to the high voltage generator | ELECTRICAL CONDUCTOR |
| Three purposes for the anode | 1. Electrical Conductor 2. Provides mechanical support for the target 3. Acts as a good thermal regulator |
| When projectile electrons interact with the anode 99% of the kinetic energy is converted to | heat |
| The small focal spot is for | better spatial resolution |
| The large focal spot is used for | large body parts |
| small filament | 0.1 to 1.0 mm |
| large filament | 0.4 to 2.0 mm |
| the maximum number of electrons are boiled off | saturation current |
| When the current in the filament is high ~4A and above – outer shell electrons are boiled off | thermionic emission |
| Discovery of X-rays | Wilhelm Conrad Roentgen |
| received first Nobel prize in physics in 1901 | Roentgen |
| First medical x-ray | his wife’s hand in 1896 |
| X-Ray radiation is a type of | ionizing radiation |
| Bundles of energy | photon |
| Similar to an electron | Beta particles |
| m/c terrestrial gas to woory about | radan |
Created by:
hakrrins
Popular Radiology sets